Obviously there would need to be a way of marking up 'shared/outer.html.erb' to indicate where the passed in partial should be rendered:

<div class="outer">
<% render Here %>
</div>

In my specific case I have a generic page header, consisting of a header and subheader, that is shared across all pages, but would like the option of passing in page-specific markup to that header to be rendered below the title and subtitle.